The effect of K, Cs and O atoms on ethylene adsorption on the Pt(111) surface
The adsorption of C2H4 on bare and Cs-, K-, O-precovered Pt(111) surfaces has been investigated, using UPS and TDS. All coadsorbates induce the appearance of more loosely (π-bonded) adsorbed species. In the presence of alkali adatoms, these new species are almost undistorted compared to gaseous, mul...
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Published in | Surface science Vol. 237; no. 1-3; pp. 63 - 71 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Lausanne
Elsevier B.V
01.11.1990
Amsterdam Elsevier Science New York, NY |
Subjects | |
Online Access | Get full text |
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Summary: | The adsorption of C2H4 on bare and Cs-, K-, O-precovered Pt(111) surfaces has been investigated, using UPS and TDS. All coadsorbates induce the appearance of more loosely (π-bonded) adsorbed species. In the presence of alkali adatoms, these new species are almost undistorted compared to gaseous, multilayered ethylene and ethylene adsorbed as a monolayer at 37 K. However, some distortion exists when ethylene is coadsorbed with oxygen atoms. The C2H4 valence-level shifts observed in the presence of K (Cs) are consistent with the electrostatic field existing in the vicinity of the alkali metal adatoms. |
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ISSN: | 0039-6028 1879-2758 |
DOI: | 10.1016/0039-6028(90)90519-E |